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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2019, Intel Corporation. */
3
4#include <linux/bpf_trace.h>
5#include <net/xdp_sock_drv.h>
6#include <net/xdp.h>
7#include "ice.h"
8#include "ice_base.h"
9#include "ice_type.h"
10#include "ice_xsk.h"
11#include "ice_txrx.h"
12#include "ice_txrx_lib.h"
13#include "ice_lib.h"
14
15/**
16 * ice_qp_reset_stats - Resets all stats for rings of given index
17 * @vsi: VSI that contains rings of interest
18 * @q_idx: ring index in array
19 */
20static void ice_qp_reset_stats(struct ice_vsi *vsi, u16 q_idx)
21{
22 memset(&vsi->rx_rings[q_idx]->rx_stats, 0,
23 sizeof(vsi->rx_rings[q_idx]->rx_stats));
24 memset(&vsi->tx_rings[q_idx]->stats, 0,
25 sizeof(vsi->tx_rings[q_idx]->stats));
26 if (ice_is_xdp_ena_vsi(vsi))
27 memset(&vsi->xdp_rings[q_idx]->stats, 0,
28 sizeof(vsi->xdp_rings[q_idx]->stats));
29}
30
31/**
32 * ice_qp_clean_rings - Cleans all the rings of a given index
33 * @vsi: VSI that contains rings of interest
34 * @q_idx: ring index in array
35 */
36static void ice_qp_clean_rings(struct ice_vsi *vsi, u16 q_idx)
37{
38 ice_clean_tx_ring(vsi->tx_rings[q_idx]);
39 if (ice_is_xdp_ena_vsi(vsi))
40 ice_clean_tx_ring(vsi->xdp_rings[q_idx]);
41 ice_clean_rx_ring(vsi->rx_rings[q_idx]);
42}
43
44/**
45 * ice_qvec_toggle_napi - Enables/disables NAPI for a given q_vector
46 * @vsi: VSI that has netdev
47 * @q_vector: q_vector that has NAPI context
48 * @enable: true for enable, false for disable
49 */
50static void
51ice_qvec_toggle_napi(struct ice_vsi *vsi, struct ice_q_vector *q_vector,
52 bool enable)
53{
54 if (!vsi->netdev || !q_vector)
55 return;
56
57 if (enable)
58 napi_enable(&q_vector->napi);
59 else
60 napi_disable(&q_vector->napi);
61}
62
63/**
64 * ice_qvec_dis_irq - Mask off queue interrupt generation on given ring
65 * @vsi: the VSI that contains queue vector being un-configured
66 * @rx_ring: Rx ring that will have its IRQ disabled
67 * @q_vector: queue vector
68 */
69static void
70ice_qvec_dis_irq(struct ice_vsi *vsi, struct ice_ring *rx_ring,
71 struct ice_q_vector *q_vector)
72{
73 struct ice_pf *pf = vsi->back;
74 struct ice_hw *hw = &pf->hw;
75 int base = vsi->base_vector;
76 u16 reg;
77 u32 val;
78
79 /* QINT_TQCTL is being cleared in ice_vsi_stop_tx_ring, so handle
80 * here only QINT_RQCTL
81 */
82 reg = rx_ring->reg_idx;
83 val = rd32(hw, QINT_RQCTL(reg));
84 val &= ~QINT_RQCTL_CAUSE_ENA_M;
85 wr32(hw, QINT_RQCTL(reg), val);
86
87 if (q_vector) {
88 u16 v_idx = q_vector->v_idx;
89
90 wr32(hw, GLINT_DYN_CTL(q_vector->reg_idx), 0);
91 ice_flush(hw);
92 synchronize_irq(pf->msix_entries[v_idx + base].vector);
93 }
94}
95
96/**
97 * ice_qvec_cfg_msix - Enable IRQ for given queue vector
98 * @vsi: the VSI that contains queue vector
99 * @q_vector: queue vector
100 */
101static void
102ice_qvec_cfg_msix(struct ice_vsi *vsi, struct ice_q_vector *q_vector)
103{
104 u16 reg_idx = q_vector->reg_idx;
105 struct ice_pf *pf = vsi->back;
106 struct ice_hw *hw = &pf->hw;
107 struct ice_ring *ring;
108
109 ice_cfg_itr(hw, q_vector);
110
111 ice_for_each_ring(ring, q_vector->tx)
112 ice_cfg_txq_interrupt(vsi, ring->reg_idx, reg_idx,
113 q_vector->tx.itr_idx);
114
115 ice_for_each_ring(ring, q_vector->rx)
116 ice_cfg_rxq_interrupt(vsi, ring->reg_idx, reg_idx,
117 q_vector->rx.itr_idx);
118
119 ice_flush(hw);
120}
121
122/**
123 * ice_qvec_ena_irq - Enable IRQ for given queue vector
124 * @vsi: the VSI that contains queue vector
125 * @q_vector: queue vector
126 */
127static void ice_qvec_ena_irq(struct ice_vsi *vsi, struct ice_q_vector *q_vector)
128{
129 struct ice_pf *pf = vsi->back;
130 struct ice_hw *hw = &pf->hw;
131
132 ice_irq_dynamic_ena(hw, vsi, q_vector);
133
134 ice_flush(hw);
135}
136
137/**
138 * ice_qp_dis - Disables a queue pair
139 * @vsi: VSI of interest
140 * @q_idx: ring index in array
141 *
142 * Returns 0 on success, negative on failure.
143 */
144static int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx)
145{
146 struct ice_txq_meta txq_meta = { };
147 struct ice_ring *tx_ring, *rx_ring;
148 struct ice_q_vector *q_vector;
149 int timeout = 50;
150 int err;
151
152 if (q_idx >= vsi->num_rxq || q_idx >= vsi->num_txq)
153 return -EINVAL;
154
155 tx_ring = vsi->tx_rings[q_idx];
156 rx_ring = vsi->rx_rings[q_idx];
157 q_vector = rx_ring->q_vector;
158
159 while (test_and_set_bit(ICE_CFG_BUSY, vsi->state)) {
160 timeout--;
161 if (!timeout)
162 return -EBUSY;
163 usleep_range(1000, 2000);
164 }
165 netif_tx_stop_queue(netdev_get_tx_queue(vsi->netdev, q_idx));
166
167 ice_qvec_dis_irq(vsi, rx_ring, q_vector);
168
169 ice_fill_txq_meta(vsi, tx_ring, &txq_meta);
170 err = ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, 0, tx_ring, &txq_meta);
171 if (err)
172 return err;
173 if (ice_is_xdp_ena_vsi(vsi)) {
174 struct ice_ring *xdp_ring = vsi->xdp_rings[q_idx];
175
176 memset(&txq_meta, 0, sizeof(txq_meta));
177 ice_fill_txq_meta(vsi, xdp_ring, &txq_meta);
178 err = ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, 0, xdp_ring,
179 &txq_meta);
180 if (err)
181 return err;
182 }
183 err = ice_vsi_ctrl_one_rx_ring(vsi, false, q_idx, true);
184 if (err)
185 return err;
186
187 ice_qvec_toggle_napi(vsi, q_vector, false);
188 ice_qp_clean_rings(vsi, q_idx);
189 ice_qp_reset_stats(vsi, q_idx);
190
191 return 0;
192}
193
194/**
195 * ice_qp_ena - Enables a queue pair
196 * @vsi: VSI of interest
197 * @q_idx: ring index in array
198 *
199 * Returns 0 on success, negative on failure.
200 */
201static int ice_qp_ena(struct ice_vsi *vsi, u16 q_idx)
202{
203 struct ice_aqc_add_tx_qgrp *qg_buf;
204 struct ice_ring *tx_ring, *rx_ring;
205 struct ice_q_vector *q_vector;
206 u16 size;
207 int err;
208
209 if (q_idx >= vsi->num_rxq || q_idx >= vsi->num_txq)
210 return -EINVAL;
211
212 size = struct_size(qg_buf, txqs, 1);
213 qg_buf = kzalloc(size, GFP_KERNEL);
214 if (!qg_buf)
215 return -ENOMEM;
216
217 qg_buf->num_txqs = 1;
218
219 tx_ring = vsi->tx_rings[q_idx];
220 rx_ring = vsi->rx_rings[q_idx];
221 q_vector = rx_ring->q_vector;
222
223 err = ice_vsi_cfg_txq(vsi, tx_ring, qg_buf);
224 if (err)
225 goto free_buf;
226
227 if (ice_is_xdp_ena_vsi(vsi)) {
228 struct ice_ring *xdp_ring = vsi->xdp_rings[q_idx];
229
230 memset(qg_buf, 0, size);
231 qg_buf->num_txqs = 1;
232 err = ice_vsi_cfg_txq(vsi, xdp_ring, qg_buf);
233 if (err)
234 goto free_buf;
235 ice_set_ring_xdp(xdp_ring);
236 xdp_ring->xsk_pool = ice_xsk_pool(xdp_ring);
237 }
238
239 err = ice_vsi_cfg_rxq(rx_ring);
240 if (err)
241 goto free_buf;
242
243 ice_qvec_cfg_msix(vsi, q_vector);
244
245 err = ice_vsi_ctrl_one_rx_ring(vsi, true, q_idx, true);
246 if (err)
247 goto free_buf;
248
249 clear_bit(ICE_CFG_BUSY, vsi->state);
250 ice_qvec_toggle_napi(vsi, q_vector, true);
251 ice_qvec_ena_irq(vsi, q_vector);
252
253 netif_tx_start_queue(netdev_get_tx_queue(vsi->netdev, q_idx));
254free_buf:
255 kfree(qg_buf);
256 return err;
257}
258
259/**
260 * ice_xsk_pool_disable - disable a buffer pool region
261 * @vsi: Current VSI
262 * @qid: queue ID
263 *
264 * Returns 0 on success, negative on failure
265 */
266static int ice_xsk_pool_disable(struct ice_vsi *vsi, u16 qid)
267{
268 struct xsk_buff_pool *pool = xsk_get_pool_from_qid(vsi->netdev, qid);
269
270 if (!pool)
271 return -EINVAL;
272
273 clear_bit(qid, vsi->af_xdp_zc_qps);
274 xsk_pool_dma_unmap(pool, ICE_RX_DMA_ATTR);
275
276 return 0;
277}
278
279/**
280 * ice_xsk_pool_enable - enable a buffer pool region
281 * @vsi: Current VSI
282 * @pool: pointer to a requested buffer pool region
283 * @qid: queue ID
284 *
285 * Returns 0 on success, negative on failure
286 */
287static int
288ice_xsk_pool_enable(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid)
289{
290 int err;
291
292 if (vsi->type != ICE_VSI_PF)
293 return -EINVAL;
294
295 if (qid >= vsi->netdev->real_num_rx_queues ||
296 qid >= vsi->netdev->real_num_tx_queues)
297 return -EINVAL;
298
299 err = xsk_pool_dma_map(pool, ice_pf_to_dev(vsi->back),
300 ICE_RX_DMA_ATTR);
301 if (err)
302 return err;
303
304 set_bit(qid, vsi->af_xdp_zc_qps);
305
306 return 0;
307}
308
309/**
310 * ice_xsk_pool_setup - enable/disable a buffer pool region depending on its state
311 * @vsi: Current VSI
312 * @pool: buffer pool to enable/associate to a ring, NULL to disable
313 * @qid: queue ID
314 *
315 * Returns 0 on success, negative on failure
316 */
317int ice_xsk_pool_setup(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid)
318{
319 bool if_running, pool_present = !!pool;
320 int ret = 0, pool_failure = 0;
321
322 if_running = netif_running(vsi->netdev) && ice_is_xdp_ena_vsi(vsi);
323
324 if (if_running) {
325 ret = ice_qp_dis(vsi, qid);
326 if (ret) {
327 netdev_err(vsi->netdev, "ice_qp_dis error = %d\n", ret);
328 goto xsk_pool_if_up;
329 }
330 }
331
332 pool_failure = pool_present ? ice_xsk_pool_enable(vsi, pool, qid) :
333 ice_xsk_pool_disable(vsi, qid);
334
335xsk_pool_if_up:
336 if (if_running) {
337 ret = ice_qp_ena(vsi, qid);
338 if (!ret && pool_present)
339 napi_schedule(&vsi->xdp_rings[qid]->q_vector->napi);
340 else if (ret)
341 netdev_err(vsi->netdev, "ice_qp_ena error = %d\n", ret);
342 }
343
344 if (pool_failure) {
345 netdev_err(vsi->netdev, "Could not %sable buffer pool, error = %d\n",
346 pool_present ? "en" : "dis", pool_failure);
347 return pool_failure;
348 }
349
350 return ret;
351}
352
353/**
354 * ice_alloc_rx_bufs_zc - allocate a number of Rx buffers
355 * @rx_ring: Rx ring
356 * @count: The number of buffers to allocate
357 *
358 * This function allocates a number of Rx buffers from the fill ring
359 * or the internal recycle mechanism and places them on the Rx ring.
360 *
361 * Returns true if all allocations were successful, false if any fail.
362 */
363bool ice_alloc_rx_bufs_zc(struct ice_ring *rx_ring, u16 count)
364{
365 union ice_32b_rx_flex_desc *rx_desc;
366 u16 ntu = rx_ring->next_to_use;
367 struct ice_rx_buf *rx_buf;
368 bool ok = true;
369 dma_addr_t dma;
370
371 if (!count)
372 return true;
373
374 rx_desc = ICE_RX_DESC(rx_ring, ntu);
375 rx_buf = &rx_ring->rx_buf[ntu];
376
377 do {
378 rx_buf->xdp = xsk_buff_alloc(rx_ring->xsk_pool);
379 if (!rx_buf->xdp) {
380 ok = false;
381 break;
382 }
383
384 dma = xsk_buff_xdp_get_dma(rx_buf->xdp);
385 rx_desc->read.pkt_addr = cpu_to_le64(dma);
386 rx_desc->wb.status_error0 = 0;
387
388 rx_desc++;
389 rx_buf++;
390 ntu++;
391
392 if (unlikely(ntu == rx_ring->count)) {
393 rx_desc = ICE_RX_DESC(rx_ring, 0);
394 rx_buf = rx_ring->rx_buf;
395 ntu = 0;
396 }
397 } while (--count);
398
399 if (rx_ring->next_to_use != ntu) {
400 /* clear the status bits for the next_to_use descriptor */
401 rx_desc->wb.status_error0 = 0;
402 ice_release_rx_desc(rx_ring, ntu);
403 }
404
405 return ok;
406}
407
408/**
409 * ice_bump_ntc - Bump the next_to_clean counter of an Rx ring
410 * @rx_ring: Rx ring
411 */
412static void ice_bump_ntc(struct ice_ring *rx_ring)
413{
414 int ntc = rx_ring->next_to_clean + 1;
415
416 ntc = (ntc < rx_ring->count) ? ntc : 0;
417 rx_ring->next_to_clean = ntc;
418 prefetch(ICE_RX_DESC(rx_ring, ntc));
419}
420
421/**
422 * ice_construct_skb_zc - Create an sk_buff from zero-copy buffer
423 * @rx_ring: Rx ring
424 * @rx_buf: zero-copy Rx buffer
425 *
426 * This function allocates a new skb from a zero-copy Rx buffer.
427 *
428 * Returns the skb on success, NULL on failure.
429 */
430static struct sk_buff *
431ice_construct_skb_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf)
432{
433 unsigned int metasize = rx_buf->xdp->data - rx_buf->xdp->data_meta;
434 unsigned int datasize = rx_buf->xdp->data_end - rx_buf->xdp->data;
435 unsigned int datasize_hard = rx_buf->xdp->data_end -
436 rx_buf->xdp->data_hard_start;
437 struct sk_buff *skb;
438
439 skb = __napi_alloc_skb(&rx_ring->q_vector->napi, datasize_hard,
440 GFP_ATOMIC | __GFP_NOWARN);
441 if (unlikely(!skb))
442 return NULL;
443
444 skb_reserve(skb, rx_buf->xdp->data - rx_buf->xdp->data_hard_start);
445 memcpy(__skb_put(skb, datasize), rx_buf->xdp->data, datasize);
446 if (metasize)
447 skb_metadata_set(skb, metasize);
448
449 xsk_buff_free(rx_buf->xdp);
450 rx_buf->xdp = NULL;
451 return skb;
452}
453
454/**
455 * ice_run_xdp_zc - Executes an XDP program in zero-copy path
456 * @rx_ring: Rx ring
457 * @xdp: xdp_buff used as input to the XDP program
458 *
459 * Returns any of ICE_XDP_{PASS, CONSUMED, TX, REDIR}
460 */
461static int
462ice_run_xdp_zc(struct ice_ring *rx_ring, struct xdp_buff *xdp)
463{
464 int err, result = ICE_XDP_PASS;
465 struct bpf_prog *xdp_prog;
466 struct ice_ring *xdp_ring;
467 u32 act;
468
469 /* ZC patch is enabled only when XDP program is set,
470 * so here it can not be NULL
471 */
472 xdp_prog = READ_ONCE(rx_ring->xdp_prog);
473
474 act = bpf_prog_run_xdp(xdp_prog, xdp);
475
476 if (likely(act == XDP_REDIRECT)) {
477 err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
478 if (err)
479 goto out_failure;
480 return ICE_XDP_REDIR;
481 }
482
483 switch (act) {
484 case XDP_PASS:
485 break;
486 case XDP_TX:
487 xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->q_index];
488 result = ice_xmit_xdp_buff(xdp, xdp_ring);
489 if (result == ICE_XDP_CONSUMED)
490 goto out_failure;
491 break;
492 default:
493 bpf_warn_invalid_xdp_action(act);
494 fallthrough;
495 case XDP_ABORTED:
496out_failure:
497 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
498 fallthrough;
499 case XDP_DROP:
500 result = ICE_XDP_CONSUMED;
501 break;
502 }
503
504 return result;
505}
506
507/**
508 * ice_clean_rx_irq_zc - consumes packets from the hardware ring
509 * @rx_ring: AF_XDP Rx ring
510 * @budget: NAPI budget
511 *
512 * Returns number of processed packets on success, remaining budget on failure.
513 */
514int ice_clean_rx_irq_zc(struct ice_ring *rx_ring, int budget)
515{
516 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
517 u16 cleaned_count = ICE_DESC_UNUSED(rx_ring);
518 unsigned int xdp_xmit = 0;
519 bool failure = false;
520
521 while (likely(total_rx_packets < (unsigned int)budget)) {
522 union ice_32b_rx_flex_desc *rx_desc;
523 unsigned int size, xdp_res = 0;
524 struct ice_rx_buf *rx_buf;
525 struct sk_buff *skb;
526 u16 stat_err_bits;
527 u16 vlan_tag = 0;
528 u16 rx_ptype;
529
530 rx_desc = ICE_RX_DESC(rx_ring, rx_ring->next_to_clean);
531
532 stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS0_DD_S);
533 if (!ice_test_staterr(rx_desc, stat_err_bits))
534 break;
535
536 /* This memory barrier is needed to keep us from reading
537 * any other fields out of the rx_desc until we have
538 * verified the descriptor has been written back.
539 */
540 dma_rmb();
541
542 size = le16_to_cpu(rx_desc->wb.pkt_len) &
543 ICE_RX_FLX_DESC_PKT_LEN_M;
544 if (!size)
545 break;
546
547 rx_buf = &rx_ring->rx_buf[rx_ring->next_to_clean];
548 rx_buf->xdp->data_end = rx_buf->xdp->data + size;
549 xsk_buff_dma_sync_for_cpu(rx_buf->xdp, rx_ring->xsk_pool);
550
551 xdp_res = ice_run_xdp_zc(rx_ring, rx_buf->xdp);
552 if (xdp_res) {
553 if (xdp_res & (ICE_XDP_TX | ICE_XDP_REDIR))
554 xdp_xmit |= xdp_res;
555 else
556 xsk_buff_free(rx_buf->xdp);
557
558 rx_buf->xdp = NULL;
559 total_rx_bytes += size;
560 total_rx_packets++;
561 cleaned_count++;
562
563 ice_bump_ntc(rx_ring);
564 continue;
565 }
566
567 /* XDP_PASS path */
568 skb = ice_construct_skb_zc(rx_ring, rx_buf);
569 if (!skb) {
570 rx_ring->rx_stats.alloc_buf_failed++;
571 break;
572 }
573
574 cleaned_count++;
575 ice_bump_ntc(rx_ring);
576
577 if (eth_skb_pad(skb)) {
578 skb = NULL;
579 continue;
580 }
581
582 total_rx_bytes += skb->len;
583 total_rx_packets++;
584
585 stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS0_L2TAG1P_S);
586 if (ice_test_staterr(rx_desc, stat_err_bits))
587 vlan_tag = le16_to_cpu(rx_desc->wb.l2tag1);
588
589 rx_ptype = le16_to_cpu(rx_desc->wb.ptype_flex_flags0) &
590 ICE_RX_FLEX_DESC_PTYPE_M;
591
592 ice_process_skb_fields(rx_ring, rx_desc, skb, rx_ptype);
593 ice_receive_skb(rx_ring, skb, vlan_tag);
594 }
595
596 if (cleaned_count >= ICE_RX_BUF_WRITE)
597 failure = !ice_alloc_rx_bufs_zc(rx_ring, cleaned_count);
598
599 ice_finalize_xdp_rx(rx_ring, xdp_xmit);
600 ice_update_rx_ring_stats(rx_ring, total_rx_packets, total_rx_bytes);
601
602 if (xsk_uses_need_wakeup(rx_ring->xsk_pool)) {
603 if (failure || rx_ring->next_to_clean == rx_ring->next_to_use)
604 xsk_set_rx_need_wakeup(rx_ring->xsk_pool);
605 else
606 xsk_clear_rx_need_wakeup(rx_ring->xsk_pool);
607
608 return (int)total_rx_packets;
609 }
610
611 return failure ? budget : (int)total_rx_packets;
612}
613
614/**
615 * ice_xmit_zc - Completes AF_XDP entries, and cleans XDP entries
616 * @xdp_ring: XDP Tx ring
617 * @budget: max number of frames to xmit
618 *
619 * Returns true if cleanup/transmission is done.
620 */
621static bool ice_xmit_zc(struct ice_ring *xdp_ring, int budget)
622{
623 struct ice_tx_desc *tx_desc = NULL;
624 bool work_done = true;
625 struct xdp_desc desc;
626 dma_addr_t dma;
627
628 while (likely(budget-- > 0)) {
629 struct ice_tx_buf *tx_buf;
630
631 if (unlikely(!ICE_DESC_UNUSED(xdp_ring))) {
632 xdp_ring->tx_stats.tx_busy++;
633 work_done = false;
634 break;
635 }
636
637 tx_buf = &xdp_ring->tx_buf[xdp_ring->next_to_use];
638
639 if (!xsk_tx_peek_desc(xdp_ring->xsk_pool, &desc))
640 break;
641
642 dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, desc.addr);
643 xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma,
644 desc.len);
645
646 tx_buf->bytecount = desc.len;
647
648 tx_desc = ICE_TX_DESC(xdp_ring, xdp_ring->next_to_use);
649 tx_desc->buf_addr = cpu_to_le64(dma);
650 tx_desc->cmd_type_offset_bsz =
651 ice_build_ctob(ICE_TXD_LAST_DESC_CMD, 0, desc.len, 0);
652
653 xdp_ring->next_to_use++;
654 if (xdp_ring->next_to_use == xdp_ring->count)
655 xdp_ring->next_to_use = 0;
656 }
657
658 if (tx_desc) {
659 ice_xdp_ring_update_tail(xdp_ring);
660 xsk_tx_release(xdp_ring->xsk_pool);
661 }
662
663 return budget > 0 && work_done;
664}
665
666/**
667 * ice_clean_xdp_tx_buf - Free and unmap XDP Tx buffer
668 * @xdp_ring: XDP Tx ring
669 * @tx_buf: Tx buffer to clean
670 */
671static void
672ice_clean_xdp_tx_buf(struct ice_ring *xdp_ring, struct ice_tx_buf *tx_buf)
673{
674 xdp_return_frame((struct xdp_frame *)tx_buf->raw_buf);
675 dma_unmap_single(xdp_ring->dev, dma_unmap_addr(tx_buf, dma),
676 dma_unmap_len(tx_buf, len), DMA_TO_DEVICE);
677 dma_unmap_len_set(tx_buf, len, 0);
678}
679
680/**
681 * ice_clean_tx_irq_zc - Completes AF_XDP entries, and cleans XDP entries
682 * @xdp_ring: XDP Tx ring
683 * @budget: NAPI budget
684 *
685 * Returns true if cleanup/tranmission is done.
686 */
687bool ice_clean_tx_irq_zc(struct ice_ring *xdp_ring, int budget)
688{
689 int total_packets = 0, total_bytes = 0;
690 s16 ntc = xdp_ring->next_to_clean;
691 struct ice_tx_desc *tx_desc;
692 struct ice_tx_buf *tx_buf;
693 u32 xsk_frames = 0;
694 bool xmit_done;
695
696 tx_desc = ICE_TX_DESC(xdp_ring, ntc);
697 tx_buf = &xdp_ring->tx_buf[ntc];
698 ntc -= xdp_ring->count;
699
700 do {
701 if (!(tx_desc->cmd_type_offset_bsz &
702 cpu_to_le64(ICE_TX_DESC_DTYPE_DESC_DONE)))
703 break;
704
705 total_bytes += tx_buf->bytecount;
706 total_packets++;
707
708 if (tx_buf->raw_buf) {
709 ice_clean_xdp_tx_buf(xdp_ring, tx_buf);
710 tx_buf->raw_buf = NULL;
711 } else {
712 xsk_frames++;
713 }
714
715 tx_desc->cmd_type_offset_bsz = 0;
716 tx_buf++;
717 tx_desc++;
718 ntc++;
719
720 if (unlikely(!ntc)) {
721 ntc -= xdp_ring->count;
722 tx_buf = xdp_ring->tx_buf;
723 tx_desc = ICE_TX_DESC(xdp_ring, 0);
724 }
725
726 prefetch(tx_desc);
727
728 } while (likely(--budget));
729
730 ntc += xdp_ring->count;
731 xdp_ring->next_to_clean = ntc;
732
733 if (xsk_frames)
734 xsk_tx_completed(xdp_ring->xsk_pool, xsk_frames);
735
736 if (xsk_uses_need_wakeup(xdp_ring->xsk_pool))
737 xsk_set_tx_need_wakeup(xdp_ring->xsk_pool);
738
739 ice_update_tx_ring_stats(xdp_ring, total_packets, total_bytes);
740 xmit_done = ice_xmit_zc(xdp_ring, ICE_DFLT_IRQ_WORK);
741
742 return budget > 0 && xmit_done;
743}
744
745/**
746 * ice_xsk_wakeup - Implements ndo_xsk_wakeup
747 * @netdev: net_device
748 * @queue_id: queue to wake up
749 * @flags: ignored in our case, since we have Rx and Tx in the same NAPI
750 *
751 * Returns negative on error, zero otherwise.
752 */
753int
754ice_xsk_wakeup(struct net_device *netdev, u32 queue_id,
755 u32 __always_unused flags)
756{
757 struct ice_netdev_priv *np = netdev_priv(netdev);
758 struct ice_q_vector *q_vector;
759 struct ice_vsi *vsi = np->vsi;
760 struct ice_ring *ring;
761
762 if (test_bit(ICE_DOWN, vsi->state))
763 return -ENETDOWN;
764
765 if (!ice_is_xdp_ena_vsi(vsi))
766 return -ENXIO;
767
768 if (queue_id >= vsi->num_txq)
769 return -ENXIO;
770
771 if (!vsi->xdp_rings[queue_id]->xsk_pool)
772 return -ENXIO;
773
774 ring = vsi->xdp_rings[queue_id];
775
776 /* The idea here is that if NAPI is running, mark a miss, so
777 * it will run again. If not, trigger an interrupt and
778 * schedule the NAPI from interrupt context. If NAPI would be
779 * scheduled here, the interrupt affinity would not be
780 * honored.
781 */
782 q_vector = ring->q_vector;
783 if (!napi_if_scheduled_mark_missed(&q_vector->napi))
784 ice_trigger_sw_intr(&vsi->back->hw, q_vector);
785
786 return 0;
787}
788
789/**
790 * ice_xsk_any_rx_ring_ena - Checks if Rx rings have AF_XDP buff pool attached
791 * @vsi: VSI to be checked
792 *
793 * Returns true if any of the Rx rings has an AF_XDP buff pool attached
794 */
795bool ice_xsk_any_rx_ring_ena(struct ice_vsi *vsi)
796{
797 int i;
798
799 ice_for_each_rxq(vsi, i) {
800 if (xsk_get_pool_from_qid(vsi->netdev, i))
801 return true;
802 }
803
804 return false;
805}
806
807/**
808 * ice_xsk_clean_rx_ring - clean buffer pool queues connected to a given Rx ring
809 * @rx_ring: ring to be cleaned
810 */
811void ice_xsk_clean_rx_ring(struct ice_ring *rx_ring)
812{
813 u16 i;
814
815 for (i = 0; i < rx_ring->count; i++) {
816 struct ice_rx_buf *rx_buf = &rx_ring->rx_buf[i];
817
818 if (!rx_buf->xdp)
819 continue;
820
821 rx_buf->xdp = NULL;
822 }
823}
824
825/**
826 * ice_xsk_clean_xdp_ring - Clean the XDP Tx ring and its buffer pool queues
827 * @xdp_ring: XDP_Tx ring
828 */
829void ice_xsk_clean_xdp_ring(struct ice_ring *xdp_ring)
830{
831 u16 ntc = xdp_ring->next_to_clean, ntu = xdp_ring->next_to_use;
832 u32 xsk_frames = 0;
833
834 while (ntc != ntu) {
835 struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[ntc];
836
837 if (tx_buf->raw_buf)
838 ice_clean_xdp_tx_buf(xdp_ring, tx_buf);
839 else
840 xsk_frames++;
841
842 tx_buf->raw_buf = NULL;
843
844 ntc++;
845 if (ntc >= xdp_ring->count)
846 ntc = 0;
847 }
848
849 if (xsk_frames)
850 xsk_tx_completed(xdp_ring->xsk_pool, xsk_frames);
851}